Tuyere



(No Model.)

J. M. HARTMAN.

` TUYBRB.

No. 485,881. Patented Nov. 1., 1892.

WITN ESSES fw.

UNIT-ED STATES* PATENT OFFICE.

JOHN M. HARTMAN, OF PHILADELPHIA, PENNSYLVANIA.

TUYER.

SPECIFICATION forming part of Letters Patent No. 485,381, dated November1, 1892.

Application nea April 21, 1387.

.To all whom t may concern.-

Be it known that I, JOHN M. HARTMAN, of Philadelphia, in the State ofPennsylvania, have invented certain new and useful Improvements inTuyeres, of which the followv ing is a specification, reference beinghad to tion on the line e' z of Fig. l.

the accompanying drawings, wherein Figure l represents a verticallongitudinal section through the tuyere, tuyere-breast, and end of thetuyere-pipe, certain other parts connected therewith being shown inelevation. l Fig. 2 is a top View of the tuyere-pipe, showing, also, thevertical blast-pipe in seo- Fig. 3 is a trans` verse section through thetuyere-breast on the line y 'y of Fig. 1. Fig. 4 is a transverse sectionthrough the nose of the tuyere on the line of Fig. 1, and Fig. 5 is arear view of the tuyere.

Among the objects of my improvements are the following: to insure apositive water circulation at the vital points, to facilitate'theremoval of deposit from the tuyere, to'hold the tuyere firmly in thebreast and at the same time prevent it from sticking or jamming therein,to provide a detachable packing-cup, to prevent the internal pressurefrom blowing the tuyere-pipe out of position, while at the same time itis left free to expand longitudinally and thus avoid breakage, and toprovide a better method of supporting and applying the water-dischargeof the tuyere.

In the drawings, A represents the tuyere, cast, as usual, with doubleshell, but having an interior partition h extending between the shellsthe entire length at the top, and a partition f at the bottom, whichextends to within a short distance of the nose of the tuyerepipe.

The water-inlet pipe d extends from the butt down to within a shortdistance of the nose, so as to deliver the fresh water directly againstthe same without previous contact with the heated wall of the tuyere andis placed close to the partition h on the one side, while the exit-pipeb is similarly placed close to the other side of said partition. Thepartitions h and f may be cast in onevpiece with the tuyere, or they maybe cast separately and inserted in suitable grooves on the inner surfaceof the tuyere-shell. An opening a of a sufficient size to permit theinsertion of the seria No. 235.599. (No model.)

-partition fis formed in the lower side of the butt, and closed when notin use by a screwplug, as shown, and a similar opening and plug are usedfor the partition h, when it also is detachably applied.

As is well known, the points most liable to destruction are the upperedges of the top and bottom of the nose, upon which the melted iron andcinder rimpinge, and the above method of construction compels thecirculation of water to come into contact with said parts in a moreefficient manner than do the devices heretofore used, where only asingle partition between the inlet and the exit pipes was applied, andwhere, consequently, the water could be driven back from the front endof the tuyere. The, opening a on the lower side of the butt, extendingas it does on each side of the bottom partition f, enables the' operatorto readily remove the mud or deposit from the tuyere.

B represents the tuyere-breast, which is constructed in the ordinarymanner, except that it has at its front end an inwardly-projectingflange t. Heretofore it has been customary to fit the tuyere closelyagainst the correspondingly-tapered inner surface of the breast; but ithas been found that this method of construction rendered the tuyereliable to jam or stick to the breast and great difficulty has beenexperienced in removing it therefrom. To prevent this, I make theopening in the front end of the breast somewhat larger than the exteriordiameter of the tuyere-butt vand cast upon the latter an annular ange R,which brings up against the inside' of the flange t of thetuyere-breast. Gente'ring-lugs c c (see Fig. 3) are cast upon oppositesides of the flange t to maintain the tuyere in proper position, and itis secured by means of a key m, which abuts against the lug g, cast uponthe inside of the tuyere-breast. Heretofore a rearwardly-projecting deepflange to receive the clay packing around the tuyere-pipe has been castin one piece with the tuyere itself, which not only increased thediiculty of casting, but used up a considerable quantity of expensivetuyere metal, and, moreover, had to be thrown aside when the tuyere wasdiscarded. To obviate this, I use a detachable packing-cup D,which maybe of cast-iron or other cheap metal and which has a screwthread uponits front end corresponding with one upon the interior of thetuyere-butt. In this way I not only can make the parts interchangeable,so that one packing-cup may be used for a number of tuyeres, but canextend the packing-cup to a greater length, as to maintain a betterpacking around the tuyereki e.

D Ig? represents the tuyere-pipe,whieh, instead 1o of bearing at itsfront end against the butt of the tuyere or the packing-flange, passesentirely through the packingcup D and projects into the interior of thetuyere without cominginto direct contacttherewith. The tuyerepipe istruly cylindrical in form and can expand lengthwise through the packing,and since it does not abut against the tuyere or any rigidbearing-surface at its front end the risk of breaking is avoided andundue strain upon the support for the rear end of the pipe is prevented.Instead of holding the tuyerepipe in position by means of a rodextending from its rear end to the tuyerebreast or by other directfastenings, I provide the followin gjsystem of attaching the verticalblast-pipe G, which carries the rear end of the tuyerepipe and which, Ihave found, enables me to dispense with the tie-rod or other distinctsupport.

At the top and bottom of the vertical blastpipe G are strong bands T T,east upon or otherwise rigidly secured to said pipes. These bands haveprojections or lugs nn, which are in line with the axis of thetuyere-pipe C and are directly over the prolongation of said axis.Openings are formed in said lugs to permit the passage of bolts H H. Thelower ends of the bolt Il' project under and engage with a iiange m,formed on the upper part of 4o the elbow I), which connects thetuyere-pi pe "/eal pipe b to a distance of, say, three or four C andblast-pipe Gf. The bolt H projects over and engages with a iiange Q',formed on the pipe, l` rom which the vertical blast-pipe G is suspended.Suitable keys N N hold the bolts H H' firmly in position, and I havefound that by thus placing said bolts vertically above and in theline ofthe axis of the tuyerepipe C the structure is rendered sufficientlyrigid to resist the internal pressure transmitted by the tuyere-pipewithout other fastenings. The tnyere-pipe C itself is attached to theelbow P by a similar system of bolts 7s and keys Z, which, however, neednot be particularly described. The exterior water-disc/harge pipe b iscarried upward by a vertifeet above the tuyere and is connected by aflexible hose e with a goose-neck e', suspended by a clamp E andprojecting over into a discharge-funnel F. This method of giving apositive though iexible support to the discharge-pipe I have founduseful, since with the rigid connections heretofore used thedischarge-pipes were frequently broken or displaced, and were, moreover,difficult to adapt to the tuyeres of different size or shape.

I am aware that spiral partitions have been tried to convey water to thenose of the tuyere; but in such cases the water is admitted directlyinto the annular space between the shells at the butt of the tuyere, andconsesequently is heated before it reaches the nose, owing to the longdistance which it has to travel through the spiral passage, and I knowthat such devices have for this reason failed in use. My improvementconveys the Water direct to the nose, and thus not only acts veryeffectually, but uses 'less water to do the work.

I do not confine myself to the exact position shown of thecentering-lugs. They can be placed on the tuyere itself.

Having thus described my invention, I claim- .1. In combination with atuyere having a double shell forming an annular water-space, thestraight longitudinal partition extending the entire length atthe top ofthe tuyore and completely dividing said space at that point, thewater-inlet pipe projecting inward on one side of said partition to apoint in close proximity to the nose, the water-exit pipe similarlyarranged upon the opposite side of said partition, and the straightpartition arranged diametrically to the first one and extending from thebutt to a point in close proximity to the nose, substantially as setforth,where by the fresh water is delivered Without previous contactwith the tuyere metal directly against the upper portion of the nose andis compelled to travel to the point of discharge around the metal of thenose.

2. The combination, with the tuyere, of a removable partition f,extending longitudinally partly along the bottom, and an opening a inthe butt and extending on each side of said partition, as and for thepurposes set forth.

3. The combination of atuyere-breasthaving an inwardly-projectingannular flange at its front end, a tuyere of less external diameter thanthe opening of said iiange and having an outwardly-projecting iangearound its butt, and means, substantially as set forth, whereby saidfianges are secured in contact and an annular chamber is formed betweenthe exterior of the tuyere and the corresponding end portion of thetuyere-breast, substantially as and for the purposes set forth.

4;. The combination, with the tuyere, of the packing-cup D, removablysecured toits rear end, and the water supply and discharge pipes of thetuyere, arranged externally to said packing-cup, as set forth.

JOHN M. HARTMAN.

Witnesses:

MARK WILBER COLLET, GEORGE W. IVORMAN.

